do not directly call rtfree() to meet an assumption in the callee. (this fix suppresses a warning message appearing in the boot time on IPv6-enabled systems)
do not directly call rtfree() to meet an assumption in the callee.
(this fix suppresses a warning message appearing in the boot time on
IPv6-enabled systems)

Approved by:	gnn (mentor)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase